title: Meta-analyses of ultrasound-guided versus traditional peripheral nerve block techniques--are we comparing apples and oranges?
authors.forename: Toni M
authors.initials: TM
authors.lastname: Torrillo
authors.forename: Meg A
authors.initials: MA
authors.lastname: Rosenblatt
mesh_terms: D000765:Anesthesia, Conduction / Q000379:methods*; D006801:Humans; D015201:Meta-Analysis as Topic; D009407:Nerve Block / Q000379:methods*; D010525:Peripheral Nerves / Q000000981:diagnostic imaging; D016032:Randomized Controlled Trials as Topic; D018084:Ultrasonography, Interventional / Q000379:methods*